/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License
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*/
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package benchmarks.regression;
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import com.google.caliper.Param;
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public class StringReplaceAllBenchmark {
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// NOTE: These estimates of MOVEABLE / NON_MOVEABLE are based on a knowledge of
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// ART implementation details. They make a difference here because JNI calls related
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// to strings took different paths depending on whether the String in question was
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// moveable or not.
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enum StringLengths {
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EMPTY(""),
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MOVEABLE_16(makeString(16)),
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MOVEABLE_256(makeString(256)),
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MOVEABLE_1024(makeString(1024)),
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NON_MOVEABLE(makeString(64 * 1024)),
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BOOT_IMAGE(java.util.jar.JarFile.MANIFEST_NAME);
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private final String value;
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StringLengths(String s) {
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this.value = s;
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}
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}
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private static final String makeString(int length) {
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final String sequence8 = "abcdefghijklmnop";
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final int numAppends = (length / 16) - 1;
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StringBuilder stringBuilder = new StringBuilder(length);
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// (n-1) occurences of "abcdefghijklmnop"
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for (int i = 0; i < numAppends; ++i) {
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stringBuilder.append(sequence8);
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}
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// and one final occurence of qrstuvwx.
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stringBuilder.append("qrstuvwx");
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return stringBuilder.toString();
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}
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@Param private StringLengths s;
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public void timeReplaceAllTrivialPatternNonExistent(int reps) {
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for (int i = 0; i < reps; ++i) {
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s.value.replaceAll("fish", "0");
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}
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}
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public void timeReplaceTrivialPatternAllRepeated(int reps) {
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for (int i = 0; i < reps; ++i) {
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s.value.replaceAll("jklm", "0");
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}
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}
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public void timeReplaceAllTrivialPatternSingleOccurence(int reps) {
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for (int i = 0; i < reps; ++i) {
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s.value.replaceAll("qrst", "0");
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}
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}
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}
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